Conveying system of heart assistant device

Abstract

The invention relates to a conveying system of a heart assistant device. The conveying system comprises a put-away assembly and a traction assembly; the put-away assembly comprises a put-away handle,a put-away strip assembly at the far end of the put-away handle, and a put-away connecting piece used for being fixedly connected with the put-away handle and the put-away strip assembly; the put-awaystrip assembly is composed of a plurality of put-away strips which are distributed circumferentially along the central axis of the put-away connecting piece, and the far ends of the put-away strips are dispersed. The traction assembly comprises a traction connecting piece and a traction handle connected with the near end of the traction connecting piece, the put-away strip assembly is connected with the traction connecting piece, the traction handle or the put-away handle is operated to change the relative position of the put-away strip assembly and the traction connecting piece, and the expansion or contraction amplitude adjustment of the put-away strip assembly is achieved. The conveying system is simple in structure, convenient to operate, easy to adjust in real time and adjust for thesecond time, high in adaptability, capable of reducing the implanting difficulty of the heart assistant device, and capable of reducing risks caused by misoperation in operations.

Description

technical field [0001] The invention belongs to the field of medical devices, in particular to a delivery system for delivering a heart assist device to the surface of the heart. Background technique [0002] In recent years, the prevalence of heart failure has been increasing year by year, becoming a serious public health problem. Patients with clinical symptoms are similar to malignant tumors. There are many etiologies, one of the most common being dilated cardiomyopathy. Dilated cardiomyopathy is characterized by a low ejection fraction of the heart, which makes it difficult to pump enough blood to meet the metabolic demands of the body's tissues, especially the demand for oxygen. Wrapping, or restraining, the heart has been shown to improve pumping efficiency in those affected by dilated cardiomyopathy. The heart assist device is suitable for patients to achieve the purpose of treating dilated cardiomyopathy by directly applying pressure to the left ventricle and reduc...

AI Technical Summary

Problems solved by technology

The defects of this mechanism are: 1. After the heart assist device is implanted, it should be closely attached to the outer surface of the heart before it can play a role. Therefore, the shape (or size) of the heart assist device before it is inserted into the heart should be smaller than that of the heart. shape (or size) at end-diastole, or even end-systole; with this in mind, the operator places a cardiac assist device on a beating heart in a series of cuffs from the apex, across the outer surface of the ventricle, and down to the atrioventricular groove of the heart During the insertion process, as the deployment mechanism, especially the distal end of the deployment mechanism, and the inner surface of the cardiac assist device come into more contact with the outer surface of the heart, the frictional resistance becomes larger and the insertion becomes more and more difficult. The higher the value, the more difficult it is for the operator to manipulate the delivery system to implant the cardiac assist device

2. According to the theory of cardiac torsional motion, in addition to periodic systolic and diastolic motions, the heart also undergoes periodic reciprocating torsional motions in the direction of circular rotation during the process of systole and diastole. Difficulty in inserting, and it is also very likely to cause damage to the surface of the heart

3. The shape (or size) of each patient's heart is different, which makes the shape (or size) of the heart assist device also different, which requires that the heart assist device should have a certain directionality on the circumference, thus further increasing the operation Difficulty of one-time placement to the target location on the surface of the heart

This mechanism still has the same problems as Mardil’s CorCap: 1. The heart assist device slides to the surface of the heart between the inner guide and the outer guide. The guide needs to be positioned accurately, and it is not easy to adjust the position twice. Difficulty in placing the cardiac assist device at the target position on the surface of the heart; 2. The periodic reciprocating torsional movement in the direction of the heart's circular rotation also affects the positioning accuracy of the device; 3. The shape of the push rod in the delivery system has limitations, Difficult to accommodate all patients with different heart shapes (or sizes)

Images